国语自产偷拍精品视频偷,扒开腿挺进湿润的花苞,老师真嫩真紧好爽20P,小太正裸体脱裤子无遮挡

ASTM D2000-06标准简介

ASTM D2000-06标准是关于汽车用橡胶制品的分类标准，标准后面连续的数字指代是的标准被采用的年份或修订情况下，*新修改被采用的年份，目前ASTM D2000-06标准已经被弃用，现行标准版本为ASTM D2000 - 12(2017)。

1. Scope

1.1 This classification system covers the properties of vulcanized rubber materials (natural rubber, reclaimed rubber, synthetic rubbers, alone or in combination) that are intended for, but not limited to, use in rubber products for automotive applications.

NOTE 1—This classification system may serve many of the needs of other industries in much the same manner as SAE numbered steels. It must be remembered, however, that this system is subject to revision when required by automotive needs. It is recommended that the latest revision always be used.